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| 型号： | 71M6541F-IGTR/F |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/166页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METER SGL PHSE 64LQFP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 系列： | Single Converter Technology® |
| 输入阻抗： | 40 千欧 ~ 90 千欧 |
| 测量误差： | 0.5% |
| 电压 - 高输入/输出： | 2V |
| 电压 - 低输入/输出： | 0.8V |
| 电流 - 电源： | 4mA |
| 电源电压： | 3 V ~ 3.6 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-LQFP |
| 供应商设备封装： | 64-LQFP（10x10） |
| 包装： | 标准包装 |
| 其它名称： | 71M6541F-IGTR/FDKR |
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71M6541D/F/G and 71M6542F/G Data Sheet
Table 2. Required CE Code and Settings for 71M6x01 Isolated Sensor
I/O RAM
Mnemonic
FIR_LEN[1:0]
ADC_DIV
PLL_FAST
MUX_DIV[3:0] 4
MUX0_SEL[3:0]
MUX1_SEL[3:0]
MUX2_SEL[3:0] 1
MUX3_SEL[3:0] 1
RMT_E
DIFFA_E
DIFFB_E
EQU[2:0]
I/O RAM
Location
210C[2:1]
2200[5]
2200[4]
2100[7:4]
2105[3:0]
2105[7:4]
2104[3:0]
2104[7:4]
2709[3]
210C[4]
210C[5]
2106[7:5]
71M6541D/F/G
(hex)
1
1
1
3
0
A
1
1
1
1
0
0 or 1
71M6542F/G
(hex)
1
1
1
3
0
A
9
1
1
1
0
0, 1 or 2
CE Code
--
CE41B016201 2
CE41B016601 3
Equations
Current Sensor Type
Applicable Figure
--
--
--
0, 1
1 Local Shunt
and
1 Remote Shunt
0, 1 and 2
1 Local Shunt
and
1 Remote Shunt
Notes:
1.
2.
3.
4.
Although not used, set to 1 (the sample data is ignored by the CE)
71M654x with 71M6201 remote sensor (200 Amps)
71M654x with 71M6601 remote sensor (60 Amps)
MUX_DIV[3:0] must be set to 0 while writing the other RAM locations in this table.
Maxim updates the CE code periodically. Contact your local Maxim representative to obtain the
latest CE code and the associated settings. The configuration presented in this table is set by the
MPU demonstration code during initialization.
Using settings for the I/O RAM Mnemonics listed in Table 1 and Table 2 that do not match
those required by the corresponding CE code being used results in undesirable side effects
and must not be selected by the MPU. Consult your local Maxim representative to obtain the
correct CE code and AFE / MUX settings corresponding to the application.
For a basic single-phase application, the IAP-IAN current input is configured for differential mode,
whereas the VA pin is single-ended and is typically connected to the phase voltage via a resistor divider.
The IBP-IBN differential input may be optionally used to sense the Neutral current. This configuration
implies that the multiplexer applies a total of three inputs to the ADC. For this configuration, the
multiplexer sequence is as shown in Figure 6 . In this configuration IAP-IAN, IBP-IBN and VA are
sampled, the extra conversion time slot (i.e., slot 2) is the optional Neutral current, and the physical
current sensor for the Neutral current measurement may be omitted if not required.
For a standard single-phase application with tamper sensor in the neutral path, two current inputs can be
configured for differential mode, using the pin pairs IAP-IAN and IBP-IBN. This means that the multiplexer
applies a total of three inputs to the ADC. In this application, the system design may use two locally
connected current sensors via IAP-IAN and IBP-IBN, as shown in Figure 2 , and configured as differential
inputs. Alternately, the IAP-IAN pin pair is configured as a differential input and connected to a local current
shunt, and IBP-IBN is configured to connect to an isolated 71M6x01 isolated sensor (i.e., RMT_E = 1), as
shown in Figure 3 . The VA pin is typically connected to the phase voltage via resistor dividers. For this
configuration, the multiplexer frame is also as shown in Figure 6 and time slot 2 is unused and ignored by
the CE, as the samples corresponding to the remote sensor (IBP-IBN) do not pass through the
multiplexer and are stored directly in CE RAM. The remote current sensor channel is sampled during the
second half of the multiplexer frame and its timing relationship to the VA voltage is precisely known so
that delay compensation can be properly applied.
The 71M6542F adds the ability to sample a second phase voltage (applied at the VB pin), which makes it
suitable for meters with two voltage and two current sensors, such as meters implementing Equation 2 for
dual-phase operation (P = VA*IA+VB*IB). Figure 7 shows the multiplexer sequence when four inputs are
16
Rev 4
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